Lamp-fixture



C. J. HENSCH EL.

LAMP FIXTURE. APPLICATION-FILED MAR. gs, 1919.

1,377,480. Patented May16, 1921.

ATTORNEY- UNITED STATES rATEN'r err-ice.

CHARLES J. HENSGHEL F BROOKLYN, NEW YORK.

LAMP-FIXTURE.

Application filed March 28, 1919. Serial No. 285,903.

I clear, and concise description.

, My invention relates tolamp fixtures employed in connection with lampsused on shipboard, for the purpose of protecting the lamp againstbreakage and also against the entrance of moisture thereinto.

More particularly stated, to seek to provide a lamp fixture of the typestated, in which the mechanism is greatly simplified as well as renderedmore efficient and reli able.

Reference is made to the accompanying drawing forming a part of thisspecification, and in which like letters indicate like parts in all ofthe figures.

Figure 1 is a front view of my device, and is partly in elevation andpartly in section.

Fig. 2 is a fragmentary plan view of the same.

A base 3 has the general form of a massive cup, and serves as a supportfor the device. This base is provided with bosses P and with a rim 41having an annular groove 5. The rim 4 has also a number of lugs 6, eachthreaded internally as shown at the right of Fig. 1. The base 3 isfurther provided with a form of lug 7, through which screws may beextended in order to secure the fixture to a deck, a wall or a floor asthe case may be.

The cup 3 with its rim 4 and lugs 6 and 7 is cast integral in a singlepiece.

A lamp base is shown at 8, and extending from it is an incandescent lamp9, of the usual or any preferred construction.

A clamping ring 10 of massive construction is provided with lugs 11 castintegral with it. Each of these lugs is provided internally with athreaded surface 12. Screw bolts 13 extend through the lugs 11 and intoengagement with the lugs 6, for the purpose of holding the clamping ringin position upon the base. These screw bolts are of such form as not tobe too easily disconnected from. the clamping ring.

A gasket 14 of rubber or resilient composition is located within thegroove 5, and the clamping ring 11 is provided with an annular flange 15for engaging this gasket,

in order to make a joint which is watertight. For this purpose theflange 15 projects slightly away from the adjacent surface of theclamping ring.

A glass globe 16, having the general form of a dome, is provided with aflaring base portion 17, the clamping ring being also slightly flared soas to it neatly upon this base portion. A thin filling 18 of cement isdisposed between the inner surface of the clamping ring and the adjacentouter surface of the hearing or base portion of the glass globe. Thecement thus used is preferably made of litharge and glycerin, but anyother cement or cementitious material, suitable for the purpose, may beused instead. The cement here contemplated makes a joint which iswater-tight, dust proof and airtight.

A number of metallic rods 19 are screwed into the holes in the clampingring 10, and these rods are riveted securely to the ring 20 and spacedequidistant.

The rods 19 also extend through holes in,

a ring 20 and are riveted to this ring.

The ring 20 carries a number of curved bars 21 which support a ring 22of much smaller diameter than the ring 20. The rings 20 and 22 with thebars 21 extending between them are cast integral with eaeli other andthus made in a single piece, having the form of a skeleton dome. Thispiece has a good many advantages. Because it is an integral casting nopart of it can work loose or become displaced, or get lost. By its usethe cost of manufacture greatly lessened.

A chain 23 is by fastenings 24, 25 connected to the clamping ring 10 andthe boss 4r, forming a part of the base 3. The purpose of this chain isto prevent the base and clamping ring from becoming completelydisconnected each from the other, and particularly from preventingeither of these two parts from dropping to the deck while the other isbeing handled.

The device constructed as above described consists of a relatively smallnumber of pieces, very strongly put together. For most practicalpurposes, the clamping ring 10, rods 19 and the skeleton dome comprisingthe two rings 20 and 22 with the curved bars 21 may be treated as asingle piece.

I do not limit myself to the precise mechanism shown, as variations maybe made Specification of Letters Patent. Patented 1513, 10 1921. i

therefrom Without departing from the spirit ofmy invention as defined bythe claims.

I claim:

1. In a lamp fixture the combination of a base for supporting anincandescent lamp, a clamping ring detachably mounted upon said base andprovided With a flaring surface, a glass globe extending through saidclamping ring and provided With a flaring edge portion engaging saidflaring surface thereof, a plurality of rods mounted upon said clampingring and provided With ends extending therefrom, and a metallic domecast in a single piece and mounted upon the ends of said rods, andcoacting therewith to protect said globe.

2. As an article of manufacture, a lamp fixture comprising a base havingthe form of a cup and provided With a groove of annular form, a gasketlocated Within said groove, a clamping'ring separate from said base,said clamping ring having an annular flange extending from it and sodisposed that said annular flange can be fitted to abut edgewise againstthe face of said gasket, means for forcing said clamping ring to- Wardsaid base in order to press said annular flange edgeWise against theface of said gasket, and a globe carried by said clamping ring.

3. In a lamp fixture the combination of a base provided With a groove, agasket located Within said groove, a clamping ring provided With aprojecting flange so disposed that with the parts in position saidflange abuts edgewise against the face of said gasket, said clampingring being further provided With a flaring surface forming acontinuation of said projecting flange, a globe provided With a flaringsurface'mating said flaring surface of said clamping ring and securedfirmly thereto, and means for forcing said clamping ring toward saidbase.

CHARLES J. HENSCHEL.

